Add ProbeDeck SQL client integration guide

[chamav]

Summary

Add a community-maintained guide for ProbeDeck, an iOS and iPadOS client that connects to the ClickHouse HTTP(S) interface.

The guide covers:

• ClickHouse Cloud and self-hosted setup
• database authentication, mutual TLS, private-CA fingerprint pinning, and SSH bastions
• monitoring through system.* tables
• a reproducible query against the UK property price dataset
• protocol and result limits, plus troubleshooting

The screenshots come from the current ProbeDeck Debug build with deterministic synthetic data. They contain no production credentials or infrastructure.

Validation

• ProbeDeck Debug simulator build: passed
• Project markdownlint-cli2 rules: 0 errors
• git diff --check: passed
• Screenshots inspected at 1320 × 2868

Checklist

• No existing URL changed, so no redirect is required.
• Added the integration guide and three screenshots.
• Used current ClickHouse documentation conventions and the community-maintained support level.

[vercel]

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[github-actions]

@chamav, thanks for contributing to the ClickHouse documentation!

We’ve moved documentation development to the main ClickHouse/ClickHouse repository. For future documentation changes, please open your pull request there, with changes under the docs/ directory.

We’ll continue reviewing this pull request here during the transition, and it will be transferred as part of the migration. You don’t need to reopen it.

See the documentation README for more information.

[CLAassistant]

All committers have signed the CLA.

[chamav]

CLAassistant now reports that all committers have signed the CLA.

The red enforce-docs-cla check fails before it reaches the CLA logic: actions/checkout@v6 refuses to check out fork code from a pull_request_target workflow. The Vercel previews also require authorization from a ClickHouse team member. No contributor-side action remains for these checks.

[Blargian]

Hi @chamav, we've recently consolidated docs into https://github.com/ClickHouse/ClickHouse/tree/master/docs and will archive this repo shortly. Could I kindly ask you to open this PR on that repo?

[chamav]

Opened the replacement PR in the consolidated repository: https://github.com/ClickHouse/ClickHouse/pull/114508\n\nThank you for the direction.